アルミニウム合金の結晶粒微細化に及ぼす超音波振動の影響 Effects of Ultrasonic Vibration on Refining of Crystal Structures of Al-Si Alloys During Solidification

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  Ultrasonic vibration is applied to the solidification process of Al-Si alloys, with a horn inserted in the molten and semi-solid alloy. It is found that the primary crystals in the alloys can be refined to different extents depending on the temperature where the ultrasonic vibration is applied. In the Al-Si alloy with a hypo-eutectic composition, the dendrite primary crystals are apparently segmented by applying the ultrasonic vibration in the temperature range from 973 K to 883 K. On the other hand, the segments are found only in the local regions near the horn when the ultrasonic vibration is applied in the semi-solid temperatures, i. e. from 883 K to 850 K. When the primary crystals are angular Si in the Al-Si alloys of hyper-eutectic composition, the vibration can even refine the primary Si grains in the semi-solid area. Modeling the movement of molten alloy in mold with the application of ultrasonic vibration, an acoustic stream is feasibly caused about multiple nucleator in the molten alloy. It is therefore concluded that the primary crystal segments are dispersely distributed all over the molten alloys by such an acoustic stream, which play a role of prompting the nucleation of primary crystals.

収録刊行物

  • 鋳造工学 = Journal of Japan Foundry Engineering Society  

    鋳造工学 = Journal of Japan Foundry Engineering Society 71(2), 98-103, 1999-02 

    Japan Foundry Engineering Society

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各種コード

  • NII論文ID(NAID)
    10002554788
  • NII書誌ID(NCID)
    AN10514770
  • 本文言語コード
    JPN
  • 資料種別
    ART
  • ISSN
    13420429
  • NDL 記事登録ID
    4658651
  • NDL 雑誌分類
    ZP41(科学技術--金属工学・鉱山工学)
  • NDL 請求記号
    Z17-277
  • データ提供元
    CJP書誌  CJP引用  NDL  J-STAGE 
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